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java.lang.NullPointerException at java.util.regex.Matcher.getTextLength(Matcher.java:1140) at java.util.regex.Matcher.reset(Matcher.java:291) at java.util.regex.Matcher.<init>(Matcher.java:211) at java.util.regex.Pattern.matcher(Pattern.java:888) at com.atlassian.diff.WordLevelDiffer.tokenize(WordLevelDiffer.java:153) at com.atlassian.diff.WordLevelDiffer.diffLine(WordLevelDiffer.java:72) at com.atlassian.diff.DiffViewBean.createWordLevelDiff(DiffViewBean.java:123) at com.atlassian.jira.mail.DiffUtils.diff(DiffUtils.java:23) at sun.reflect.GeneratedMethodAccessor1256.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.doInvoke(UberspectImpl.java:381) at org.apache.velocity.util.introspection.UberspectImpl$VelMethodImpl.invoke(UberspectImpl.java:370) at com.atlassian.velocity.htmlsafe.introspection.UnboxingMethod.invoke(UnboxingMethod.java:30) at org.apache.velocity.runtime.parser.node.ASTMethod.execute(ASTMethod.java:270) at org.apache.velocity.runtime.parser.node.ASTReference.execute(ASTReference.java:262) at org.apache.velocity.runtime.parser.node.ASTReference.value(ASTReference.java:507) at org.apache.velocity.runtime.parser.node.ASTExpression.value(ASTExpression.java:71) at org.apache.velocity.runtime.parser.node.ASTSetDirective.render(ASTSetDirective.java:142) at org.apache.velocity.runtime.parser.node.SimpleNode.render(SimpleNode.java:336) at org.apache.velocity.runtime.RuntimeInstance.render(RuntimeInstance.java:1277) at org.apache.velocity.runtime.RuntimeInstance.evaluate(RuntimeInstance.java:1216) at org.apache.velocity.runtime.RuntimeInstance.evaluate(RuntimeInstance.java:1165) at org.apache.velocity.app.VelocityEngine.evaluate(VelocityEngine.java:219) at com.atlassian.velocity.DefaultVelocityManager.writeEncodedBodyForContent(DefaultVelocityManager.java:86) at com.atlassian.jira.template.velocity.DefaultVelocityTemplatingEngine$DefaultRenderRequest.toWriterImpl(DefaultVelocityTemplatingEngine.java:157) at com.atlassian.jira.template.velocity.DefaultVelocityTemplatingEngine$DefaultRenderRequest.asPlainText(DefaultVelocityTemplatingEngine.java:128) at com.atlassian.jira.template.velocity.DefaultVelocityTemplatingEngine$DefaultRenderRequest$1.with(DefaultVelocityTemplatingEngine.java:108) at com.atlassian.jira.template.velocity.DefaultVelocityTemplatingEngine$DefaultRenderRequest$StringRepresentation.toString(DefaultVelocityTemplatingEngine.java:88) at com.atlassian.jira.template.velocity.DefaultVelocityTemplatingEngine$DefaultRenderRequest.asPlainText(DefaultVelocityTemplatingEngine.java:104) at com.atlassian.jira.mail.MailingListCompiler$1.processRecipient(MailingListCompiler.java:307) at com.atlassian.jira.mail.NotificationRecipientProcessor.process(NotificationRecipientProcessor.java:39) at com.atlassian.jira.mail.MailingListCompiler.addMailsToQueue(MailingListCompiler.java:337) at com.atlassian.jira.mail.MailingListCompiler.access$400(MailingListCompiler.java:47) at com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.addEmailsToQueue(MailingListCompiler.java:495) at com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.sendLists(MailingListCompiler.java:465) at com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.sendNoLevelsIgnoreGroup(MailingListCompiler.java:445) at com.atlassian.jira.mail.MailingListCompiler$NotificationCompiler.sendForEvent(MailingListCompiler.java:434) at com.atlassian.jira.mail.MailingListCompiler.sendLists(MailingListCompiler.java:140) at com.atlassian.jira.mail.IssueMailQueueItem.send(IssueMailQueueItem.java:149) at com.atlassian.mail.queue.MailQueueImpl.sendBuffer(MailQueueImpl.java:66) at com.atlassian.jira.service.services.mail.MailQueueService.run(MailQueueService.java:28) at com.atlassian.jira.service.JiraServiceContainerImpl.run(JiraServiceContainerImpl.java:61) at com.atlassian.jira.service.ServiceRunner.execute(ServiceRunner.java:48) at org.quartz.core.JobRunShell.run(JobRunShell.java:195) at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:520)